SW60 Single Pole On/Off normally open contactor. The SW60 Series is comprised of the "PC60", "MB60" and the "SW60" a family of miniature direct current contactors and solenoid switches which are designed to fill the gap between 30 ampere relays and 100 ampere contactors. The family is divided into two distinct branches, PC60/MB60 for the printed circuit board mounting and SW60 free standing contactors and each has it own selection of variations and options.